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428
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1 /* TTY device functions.
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2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
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3 Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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4 Copyright (C) 1996 Ben Wing.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: Not in FSF. */
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24
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25 /* Authors: Ben Wing and Chuck Thompson. */
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26
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27 #include <config.h>
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28 #include "lisp.h"
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29
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30 #include "console-tty.h"
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31 #include "console-stream.h"
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32 #include "events.h"
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33 #include "faces.h"
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34 #include "frame.h"
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35 #include "lstream.h"
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36 #include "redisplay.h"
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37 #include "sysdep.h"
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38
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558
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39 #include "sysfile.h"
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428
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40 #include "syssignal.h" /* for SIGWINCH */
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41
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42 Lisp_Object Qinit_pre_tty_win, Qinit_post_tty_win;
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43
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44
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45 static void
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46 allocate_tty_device_struct (struct device *d)
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47 {
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48 d->device_data = xnew_and_zero (struct tty_device);
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49 }
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50
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51 static void
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52 tty_init_device (struct device *d, Lisp_Object props)
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53 {
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54 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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55 Lisp_Object terminal_type = CONSOLE_TTY_DATA (con)->terminal_type;
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56
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57 DEVICE_INFD (d) = CONSOLE_TTY_DATA (con)->infd;
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58 DEVICE_OUTFD (d) = CONSOLE_TTY_DATA (con)->outfd;
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59
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60 allocate_tty_device_struct (d);
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61 init_baud_rate (d);
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62
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63 switch (init_tty_for_redisplay (d, (char *) XSTRING_DATA (terminal_type)))
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64 {
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65 #if 0
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66 case TTY_UNABLE_OPEN_DATABASE:
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67 suppress_early_error_handler_backtrace = 1;
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68 error ("Can't access terminal information database");
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69 break;
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70 #endif
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71 case TTY_TYPE_UNDEFINED:
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72 suppress_early_error_handler_backtrace = 1;
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73 error ("Terminal type `%s' undefined (or can't access database?)",
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74 XSTRING_DATA (terminal_type));
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75 break;
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76 case TTY_TYPE_INSUFFICIENT:
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77 suppress_early_error_handler_backtrace = 1;
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78 error ("Terminal type `%s' not powerful enough to run Emacs",
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79 XSTRING_DATA (terminal_type));
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80 break;
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81 case TTY_SIZE_UNSPECIFIED:
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82 suppress_early_error_handler_backtrace = 1;
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83 error ("Can't determine window size of terminal");
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84 break;
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85 case TTY_INIT_SUCCESS:
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86 break;
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87 default:
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88 abort ();
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89 }
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90
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91 init_one_device (d);
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92
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93 /* Run part of the elisp side of the TTY device initialization.
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94 The post-init is run in the tty_after_init_frame() method. */
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95 call0 (Qinit_pre_tty_win);
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96 }
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97
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98 static void
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99 free_tty_device_struct (struct device *d)
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100 {
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101 struct tty_device *td = (struct tty_device *) d->device_data;
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102 if (td)
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103 xfree (td);
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104 }
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105
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106 static void
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107 tty_delete_device (struct device *d)
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108 {
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109 free_tty_device_struct (d);
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110 }
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111
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112 #ifdef SIGWINCH
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113
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114 static SIGTYPE
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115 tty_device_size_change_signal (int signo)
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116 {
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117 int old_errno = errno;
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118 asynch_device_change_pending++;
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119 #ifdef HAVE_UNIXOID_EVENT_LOOP
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120 signal_fake_event ();
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121 #endif
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122 EMACS_REESTABLISH_SIGNAL (SIGWINCH, tty_device_size_change_signal);
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123 errno = old_errno;
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124 SIGRETURN;
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125 }
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126
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127 /* frame_change_signal does nothing but set a flag that it was called.
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128 When redisplay is called, it will notice that the flag is set and
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129 call handle_pending_device_size_change to do the actual work. */
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130 static void
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131 tty_asynch_device_change (void)
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132 {
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133 Lisp_Object devcons, concons;
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134
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135 DEVICE_LOOP_NO_BREAK (devcons, concons)
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136 {
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137 int width, height;
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138 Lisp_Object tail;
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139 struct device *d = XDEVICE (XCAR (devcons));
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140 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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141
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142 if (!DEVICE_TTY_P (d))
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143 continue;
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144
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145 get_tty_device_size (d, &width, &height);
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146 if (width > 0 && height > 0
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147 && (CONSOLE_TTY_DATA (con)->width != width
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148 || CONSOLE_TTY_DATA (con)->height != height))
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149 {
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150 CONSOLE_TTY_DATA (con)->width = width;
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151 CONSOLE_TTY_DATA (con)->height = height;
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152
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153 for (tail = DEVICE_FRAME_LIST (d);
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154 !NILP (tail);
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155 tail = XCDR (tail))
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156 {
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157 struct frame *f = XFRAME (XCAR (tail));
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158
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159 /* We know the frame is tty because we made sure that the
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160 device is tty. */
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161 change_frame_size (f, height, width, 1);
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162 }
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163 }
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164 }
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165 }
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166
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167 #endif /* SIGWINCH */
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168
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169 static Lisp_Object
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170 tty_device_system_metrics (struct device *d,
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171 enum device_metrics m)
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172 {
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173 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
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174 switch (m)
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175 {
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176 case DM_size_device:
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177 return Fcons (make_int (CONSOLE_TTY_DATA (con)->width),
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178 make_int (CONSOLE_TTY_DATA (con)->height));
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179 default: /* No such device metric property for TTY devices */
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180 return Qunbound;
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181 }
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182 }
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183
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184 /************************************************************************/
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185 /* initialization */
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186 /************************************************************************/
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187
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188 void
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189 syms_of_device_tty (void)
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190 {
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191 defsymbol (&Qinit_pre_tty_win, "init-pre-tty-win");
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192 defsymbol (&Qinit_post_tty_win, "init-post-tty-win");
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193 }
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194
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195 void
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196 console_type_create_device_tty (void)
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197 {
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198 /* device methods */
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199 CONSOLE_HAS_METHOD (tty, init_device);
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200 CONSOLE_HAS_METHOD (tty, delete_device);
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201 #ifdef SIGWINCH
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202 CONSOLE_HAS_METHOD (tty, asynch_device_change);
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203 #endif /* SIGWINCH */
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204 CONSOLE_HAS_METHOD (tty, device_system_metrics);
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205 }
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206
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207 void
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208 init_device_tty (void)
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209 {
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210 #ifdef SIGWINCH
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211 if (initialized && !noninteractive)
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212 signal (SIGWINCH, tty_device_size_change_signal);
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213 #endif /* SIGWINCH */
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214 }
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